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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Monitor System - Service Information (3 Of 3) >> FRONT SIDE RADAR SENSOR (w/ Front LiDAR Sensor) >> Adjustment [10/2023 - ] >> Procedure

Adjustment [10/2023 - ]: Procedure

  1. ADJUST STANDARD VEHICLE HEIGHT 

    Refer to PROCEDURE - Step 2

  2. PERFORM FRONT SIDE RADAR BEAM AXIS CONFIRMATION 

    HINT: 

    The front side radar beam axis confirmation is performed to confirm whether the sensor's beam axis is correct, and perform adjustment of the beam axis by using reflector.

    1. When performing the front side radar beam axis confirmation, move the vehicle to a place where the space shown in the illustration can be secured.
      GTY804005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Right Side Of Vehicle *B Left Side Of Vehicle
      *a Vehicle Center Line *b Front Bumper
      *c Inspection Area - -

      Standard

      Location Measurement
      a 2 m (6.56 ft.)
      b 4 m (13.12 ft.)
      c 6 m (19.68 ft.)
      NOTE:
      • Perform this inspection on level ground.
      • Make sure that there are no metal objects around the vehicle or on the ground.
      • Unload the vehicle before beginning the inspection.
      • Confirm that the tire pressure is correct before beginning the inspection.
      • Do not place any objects other than the reflector (such as a large metallic object) in or allow people to enter the inspection area (W 6 m [19.68 ft.] x L 6 m [19.68 ft.] x H 4 m [13.12 ft.]) shown in the illustration.
    2. Place the reflector.
      1. Hang a weight with a pointed tip from the center of the rear emblem, and mark the rear center point of the vehicle (point A) on the ground.
        GTY792949Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a String *b Weight
        *c Center point *d Bilateral Symmetry

        HINT: 

        Lightly flick the string with your fingers several times to confirm that the string is aligned with mark A.

      2. Hang a weight with a pointed tip from the center of the radiator grille (or front panel) emblem, and mark the front center point of the vehicle (point B) on the ground.
        GTY966274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a String *b Weight
        *c Center point *d Bilateral Symmetry

        HINT: 

        Lightly flick the string with your fingers several times to confirm that the string is aligned with mark B.

      3. Draw a vehicle center line so that it passes through mark A and B (front and rear center points).
        GTY787059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Vehicle center line
      4. Enlarge and print out the poster shown in the illustration.
        GTY966341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Poster *b Edge Of Front Bumper
        *c Line C *d Vehicle center line

        Standard

        Part Angle
        a 75.0°
      5. Attach the printed poster to the floor with the vehicle center line aligned with point B as shown in the illustration.
        GTY835428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Poster
        *b Vehicle Center Line
      6. Align a piece of string with line C and mark point D at a distance of 3142 mm (10.31 ft.) from point B.
        GTY807085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Vehicle Front
        *b Vehicle Center Line
        *c String
        *d Poster
      7. Set the reflector at the point D shown in the illustration below.
        • SST: 09870-60000 
          1. 09870-60010
        • SST: 09870-60040 
        GTY801278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *A Right Side Of Vehicle *B Left Side Of Vehicle
        *a Vehicle Center Line *b Reflector

        Standard

        Part Length
        a 3142 mm (10.31 ft.)
        NOTE:
        • Set the reflector so that its center is 521 mm (1.71 ft.) above the ground.
          GTY806612Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
          *a SST (reflector)
          *b 521 mm (1.71 ft.)
        • The center of the triangular pyramid is the reference point for the setting position and angle.
          GTY829998Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
          *a Center Of Triangular Pyramid
          GTY786174Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
          *a SST (reflector)
    3. Perform the front side radar beam axis display.
      1. Turn the power switch off (IG).
      2. Connect the Techstream to the DLC3.
      3. Turn the power switch on (IG).
      4. Turn the front side radar system on.
      5. Turn the Techstream on.
      6. Enter the following menus: Body Electrical / Front Side Radar Master or Front Side Radar Slave / Utility / Front Side Radar Master Beam Axis Display or Front Side Radar Slave Beam Axis Display.

        HINT: 

        The master beam is on the RH side and the slave beam is on the LH side.

        Part Name Tester Item Expression in Others
        Front side radar sensor RH Front Side Radar Master Front side radar sensor RH (B)
        Front side radar sensor LH Front Side Radar Slave Front side radar sensor LH (A)

        Body Electrical > Front Side Radar Master > Utility 

        Tester Display
        Front Side Radar Master Beam Axis Display

        Body Electrical > Front Side Radar Slave > Utility 

        Tester Display
        Front Side Radar Slave Beam Axis Display
      7. Check the results displayed for the Front Side Radar beam axis display.

        Allowable Range

        Item Front Side Radar Sensor (Master) Front Side Radar Sensor (Slave)
        Angle -4 to +4° -4 to + 4°

        HINT: 

        If the displayed results are outside the permissible range, the following are possible causes. Therefore, implement countermeasures, check the front side radar beam axis and perform the procedure again.

        Possible Causes Countermeasure
        Incorrect SST (reflector) position Check the position of SST (reflector) and checking space and perform the procedure again
        A metallic object is located in the vicinity of the checking space Check the position of SST (reflector) and checking space and perform the procedure again
        The front side radar sensor installation is abnormal Check the installation condition of the front side radar sensor
    4. Perform the front side radar beam axis adjustment.
      1. Enter the following menus: Body Electrical / Front Side Radar Master or Front Side Radar Slave / Utility / Front Side Radar Master Beam Axis Adjustment or Front Side Radar Slave Beam Axis Adjustment.

        Body Electrical > Front Side Radar Master > Utility 

        Tester Display
        Front Side Radar Master Beam Axis Adjustment

        Body Electrical > Front Side Radar Slave > Utility 

        Tester Display
        Front Side Radar Slave Beam Axis Adjustment

        HINT: 

        When values on the axis display are in the allowable range, performing this adjustment compensates for any deviation from the normal value.

    5. After beam axis adjustment completes, clear the following system vehicle control history entries.
      1. Clear vehicle control history (Front camera system (for Stereo Camera Type)).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

      2. Clear vehicle control history (Front radar sensor system (for Stereo Camera Type)).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

      3. Clear vehicle control history (Pre-collision system (for Stereo Camera Type)).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

      4. Clear vehicle control history (Dynamic radar cruise control system (for Stereo Camera Type)).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

      5. Clear vehicle control history (Lane tracing assist system (for Stereo Camera Type)).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

      6. Clear vehicle control history (Road sign assist system (for Stereo Camera Type)).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

      7. Clear vehicle control history (Automatic high beam system).

        Refer to VEHICLE CONTROL HISTORY [10/2023 - ]

  3. PERFORM FRONT SIDE RADAR SENSOR INSTALLATION CONDITION INSPECTION 
    NOTE:
    • Perform this inspection on level ground.
    • Unload the vehicle before beginning the inspection.
    • Confirm that the tire pressure is correct before beginning the inspection.

    HINT: 

    The front side radar sensor installation condition inspection is performed to confirm whether the sensor is perpendicular to the floor surface (+/-4.5°) by using a digital angle gauge, and that the sensor is 56 to 64° from the line parallel to the vehicle center line.

    1. Remove the front bumper assembly.

      Refer to REMOVAL [10/2023 - ]

    2. Place the digital angle gauge on a level (gradient within 1%) and perform zero-point adjustment as shown in the illustration.
      GTY811961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a (+) *b (-)
      *c When Storing Zero Point *d After Storing Zero Point, Indicates 90° When Fully Horizontal
    3. Set the digital angle gauge to the outward facing surface of the front side radar sensor as shown in the illustration, and check that the perpendicular angle of the front side radar sensor is within the permissible range.
      GTY821698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Digital Angle Gauge
      *b Front Side Radar Sensor
      *c Outward Facing Surface

      HINT: 

      The outward facing surface (installation angle) is positive (+) when it faces higher than horizontal.

      GTY802882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a (+)
      *b (-)
      *c Horizontal Line
      *d Digital Angle Gauge
      *e Outward Facing Surface

      Standard

      Item Allowable Range
      Front Side Radar Sensor (Master) +85.5 to +94.5°
      Front Side Radar Sensor (Slave) +85.5 to +94.5°
    4. Using the sensor installation stud bolt center lines as a reference, check that the stud bolts are as shown in the illustration.

      Standard

      Dimension Specified Value
      a 108 mm (4.25 in.)
      y 48 to 60 mm
      (1.89 to 2.36 in.)
      Degree Specified Value
      A 56 to 64°
      GTY776236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Vehicle Front (LH)
      *a Vehicle Front
      *b Vehicle Rear
      *c Line Parallel To The Vehicle Center Line
      *d Stud Bolt
      *e Stud Bolt Center Line

      HINT: 

      If the results are not as specified, it is possible that the front side radar sensor installation area (frame, front side radar sensor bracket, head light assembly) is deformed, so make corrections as necessary.

    5. Install the front bumper assembly.

      Refer to INSTALLATION [10/2023 - ]

  4. INSPECT VEHICLE HEIGHT CONTROL 

    Refer to PROCEDURE - Step 9

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